A database administrator (DBA) directs performs all activities related to maintaining a successful database environment. And responsibilities include designing, implementing, and maintaining the database system; establishing policies and procedures pertaining to the management, security, maintenance, and use of the database management system; and training employees in database management like Software installation and Maintenance, Data Extraction, Transformation, Data Loading, Specialized Data Handling, Database Backup and Recovery, Security Authentication. Capacity Planning, Performance Monitoring, Database Tuning, and Troubleshooting